Muzzle plug



FIG. 1 is an elevated front view of a muzzle plug showing my new design;

FIG. 2 is an elevated right side view thereof, the left side being identical;

FIG. 3 is top plan view thereof;

FIG. 4 is an elevated back view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is an elevated front view of FIG. 1 with a partial view of a gun muzzle, sight and ram rod shown in broken lines.

The broken lines in the drawings are used to illustrate environment and unclaimed parts of the muzzle plug and form no part of the claimed design. 

CLAIM The ornamental design for a muzzle plug, as shown and described. 